Link door-check.



R. KRAUS.

LINK DOOR CHECK.

APPLICATION FILED MAY 16, 1914.

1,127,454, Patented Feb. 9, 1915.

WITNESSES INVE/VTOR JW W 3 1 ya. MW

w ATTORA/ y "HE NORRIS PETERS 60.. PHDTO-LITHO., WASHINGTON. D, C

RUDOLF minus, or new YORK, N. Y.

LINK DOOR-CHECK.

Application filed May it, 19 14.

To (122 whom-it may concern Be it known that I, R DQLF Knans, a'subjectof the Emperor of Austria-Hungary, and a resident of the city of NewYork, 1n the county of New York and State of New York, have inventedcertain new and useful Improvements in Link Door-Cheeks, "of which thefollowing is a specification.

The present invention relates to a doorcheck, and has for one of itsobjects to provide a simple and inexpensive dB'VlSZQ of this type which,when in a certain POSltlOIl, allows the door to be opened to someextent,and which, when in another position, serves to lock effectively the doorto prevent the same from being opened even to a slight extent.

With these and other objects in view, which will more fully appear asthe nature of the invention is better understood, the same consists inthe combination, arrangement and construction of parts hereinafter fullydescribed, pointed out in the appended claim and illustrated in theaccompanylng drawings, it being understood that many changes may be madein the size and proportion of the several parts and details ofconstruction within the scope of the appended claim without departingfrom the spirit or sacrificing any of the advantages of the invention.

One of the many possible embodiments of the invention is illustrated inthe accompanying drawings, in which Figure 1 is a front elevation of aportion of a door and door frame to which a doorcheck constructed inaccordance with the present invention is applied, the parts being inpositions to hold the door closed; Fig. 2 is a section taken on line 22of Fig. 1; and Fig. 3 is a front elevation of the device in a positionso as to allow the door to be opened partially.

Generally speaking, the invention consists of a slotted link pivoted toeither the door or the jamb, in combination with a stud pin that ispivotally attached to the other one of said two elements, means beingprovided for preventing the disengagement of said link and stud pinunless the door is entirely closed.

Referring now more particularly to the drawings, the numeral 1 indicatesa portion of a door jamb, and 2 designates a portion of a door. A baseplate 3 is secured rigidly in position upon the door jamb by screws 4,

Specification of Letters Patent.

Patented Febifi, 1915.

Serial No 839,029.

or otherwise,said.plate being provided with a link 8, that is made, forinstance, of wire,

and comprises two parallel legs 9, which are suitably spaced apart,whereby a longitudi- -nal slot 10 is provided for a purpose hereinafterto be described. This link is formed by bending the wire at its middleportion 11 back upon itself in parallel relation, its ends, forming thepivot pins 7, being bent at right angles to the longitudinal axes ofsaid legs. Near the pivot pins 7 each legis curved outward, as shown at12, "thereby forming a substantially circular enlargement of the slot10.

A base plate 13 is fastened by screws 14:, or otherwise, to the door 2in alinement with the :plate 3 above mentioned. The plate 18 hasinwardly extending lugs 15, to which is pivoted by means of a verticallydisposed pin 16, or otherwise, a stud pin 17, having upon its free endan enlarged round head 18, the circular enlargement of the slot 10 thatis formed by bending out the portions 12 of the legs of the link beingadapted to accommodate the head 18 of the stud pin, the diameter of thebody of the stud pin being slightly smaller than the width of the slot10. In the plate 13 is formed a screw threaded hole 19 for the receptionof a thumb screw 20, preferably of the flat head type. The head 21 ofthis thumb screw is adapted to enter the slot 10 and to clamp down, asshown in Fig. 1 of the drawings, the link 8. In the plate 3 is formed arecess 22, in which the head 18 of the stud pin may be seated.

It is obvious that, while herein the link 8 has been described as beingmounted upon the door jamb and the stud pin 17 upon the door, thepositions of these elements may be reversed if desired. It is to benoted furthermore that, while the link 8 has been described as beingformed of wire, the same may obviously be made of sheet metal bystamping or otherwise.

The operation of the device is as follows: In fastening the door by theuse of themvention, so that the door may be opened to a limited extentfor ventilation or for some other purpose, the door 2 is first closed,the link 8 having been swung previously backward into abutment with thedoor jamb.

The head of the stud pin is then seated into the recess 22 in the plate3, and the link swung forward toward the door 2, whereby the head of thestud pin is passed through the circular enlargement of the slot in saidlink. The door can now be opened to a limited extent, the body of thestud pin sliding in the slot 10 of the link, the head 18 of said pinpreventing a disengagement thereof from said link (Fig. 2). The doorcannot be opened from outside since the slotted link cannot bedisengaged from the stud pin unless the door is closed and the roundhead 18 of said pin-is about to enter the recess in the plate 8.

In order to disconnect the link from the stud pinrfor unfastening thedoor, the latter is closed and the link moved toward the door jamb intoabutting position with the latter. When it is desired to lock the door,the head of the stud pin is seated in the recess 22, the link swung intoabutment with the base plate 13 and the thumb screw turned to engage thelegs 9 of said link, thereby clamping the same against the said baseplate.

It is obvious that, inasmuch as the stud pin is pivoted to the door, thedevice can be applied to all doors no matter what difference there be inthe levels of the doors and the jambs thereof.

WVhat I claim is The combination with a door and door jamb, of a baseplate having a recess fastened to one of said members, a slotted linkpivoted to said plate, said slot being enlarged near the pivot of saidlink, a base plate fastened to the other one of said members, and a studpin pivoted to the last named plate having an enlarged head adapted tobe passed through the enlargement of 1 said slot, thereby seating thebody of said pin in said slot, whereby the disengagement of said studpin from said link is prevented unless the head of said stud pin isseated in said recess and said link is swung around its pivot to permitthe head of said pin to pass through the enlargement of said slot.

Signed at New York, in the county of New York, and State of New York,this 13th day of May, A. D. 1914.

RUDOLF KRAUS. Witnesses:

SIGMUND Hnuzoo, S. BIRNBAUM.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. G.

